78360251 has 4 divisors (see below), whose sum is σ = 78593112. Its totient is φ = 78127392.

The previous prime is 78360229. The next prime is 78360263. The reversal of 78360251 is 15206387.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78360251 - 2⁶ = 78360187 is a prime.

It is a super-2 number, since 2×78360251² = 12280657873566002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78360211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115925 + ... + 116598.

It is an arithmetic number, because the mean of its divisors is an integer number (19648278).

Almost surely, 2^78360251 is an apocalyptic number.

78360251 is a deficient number, since it is larger than the sum of its proper divisors (232861).

78360251 is a wasteful number, since it uses less digits than its factorization.

78360251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232860.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 78360251 is about 8852.1325679183. The cubic root of 78360251 is about 427.9226484809.

The spelling of 78360251 in words is "seventy-eight million, three hundred sixty thousand, two hundred fifty-one".